As for the Harmony, the only RF-capable units are:
890 - 890 Pro - 1000 - 1100
I can't stress this enough, their most popular model, the Harmony One, DOES NOT HAVE RF CAPABILITY. Many people buy it thinking it does for the price, but it does not!
If you buy the Harmony 890 boxed, it comes with 100% everything you need, including the rubber isolators and 4 IR emitters. You only need some patience to get it set up, and you'll have all the help you could need here. I will not recommend any Harmony remote other than the 890 if you desire RF, including the 890 Pro which I own and the 1000/1100 which I feel are only for the most elaborate of systems and and for people who must have a touchscreen remote.
Other option, buy any IR remote that you personally like, and buy a passive IR network repeater system. It will require you to always aim at the network's receiver eye, which you will place somewhere convenient. This is a good solution for inexpensive, same-room, Line-of-Sight (LoS) applications.
I, personally, will not advocate one exact solution over another, but I highly suggest an RF solution and not the repeater solution.
Inexpensive complete Harmony 890:
http://cgi.ebay.com/Logitech-Harmony-890-LCD-Universal-Remote-w-RF-Wireless_W0QQitemZ250473269545QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a515ec929&_trksid=p3286.c0.m14
Refurbed unit from Buy.com, I trust them and they cover their products:
http://cgi.ebay.com/Logitech-Harmony-890-Advanced-Universal-Remote-996-0_W0QQitemZ400043043999QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5d246c6c9f&_trksid=p3286.c0.m14
You can also buy the same one direct from Buy.com website I'm sure.
I also love the URC remotes. It's personal preference and up to you to decide what you like best.
Hope that helps.